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Ksenya-84 [330]
3 years ago
14

The symbol used for magnetic field is:

Physics
1 answer:
alina1380 [7]3 years ago
5 0
The letter "B" is used for magnetic field
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Why does atmospheric pressure decrease with altitude.
ella [17]

Answer:

<em>Earth's gravity pulls air as close to the surface as possible. ... As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude.</em>

5 0
3 years ago
A glass is half-full of water, with a layer of vegetable oil (n = 1.47) floating on top. A ray of light traveling downward throu
Shtirlitz [24]

Answer:

critical angle    = 64.79°

ray will not penetrate into the water

Explanation:

given details

refractive index of oil n1 = 1.47

refractive index of water n2= 1.33  

incident angle = 71.4 °

\theta_c = sin^{-1}(\frac{n2}{n1})

        = sin^{-1}(\frac{1.33}{1.47}

     critical angle    = 64.79°

incident angle > critical angle = reflection

incident angle < critical angle = refraction

In this case, 71.4 > 64.79 therefore it will undergo total internal reflection

therefore ray will not penetrate into the water

7 0
3 years ago
Two thin rectangular sheets (0.16 m x 0.44 m) are identical. In the first sheet the axis of rotation lies along the 0.16-m side,
malfutka [58]

Answer:

t'=1.124s

Explanation:

I_b*a_b=I_a*a_a

a_a=\frac{w_f}{t'}

a_b=\frac{w_f}{t}

I_b*\frac{w_f}{t}=I_a*\frac{w_f}{t'}

I_b*\frac{1}{t}=I_a*\frac{1}{t'}

I=\frac{1}{3}*M*r^2

I_a=\frac{1}{3}*M*r_a^2

I_b=\frac{1}{3}*M*r_b^2

\frac{1}{3}*M*r_b^2*\frac{1}{t}=\frac{1}{3}*M*r_a^2*\frac{1}{t'}

t'=(\frac{r_a}{r_b})^2 *t

t'=(\frac{0.16m}{0.44m})^2*t

t'=\frac{16}{121}*8.5s

t'=1.124s

7 0
3 years ago
Hi can someon help me how to answer this?<br> Btw I'm from Philippines
arlik [135]

Answer:

Test 1

1.True

2.True

3.True

4.False

5.True

6.True

7.False

8.True

9.True

10.True

yung iba nasa pic

4 0
2 years ago
Elle is pushing a box of mass 7.0 kilograms with the force of 25 newtons. If the force of friction is 2.6 newtons, what is the v
Free_Kalibri [48]
F=mxa
(25-2.6)=7 X a
22.4\7=a
a =3.2 metres per second squared
3 0
3 years ago
Read 2 more answers
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